Komatsu WA900-8 wheel loader has a new bucket designed to maximize bucket fill, which the company says will boost productivity. With operating weight of 256,618 pounds, the loader can be paired with haul trucks in the 70- to 150-ton range.
The redesigned front and rear frame is more durable than the 900-3E0 version, and loader linkages have been bulked up as well. A brake cooling system is now standard, which the company says will extend brake-service life by reducing brake oil temperature.
The 899-horsepower Komatsu SSA12V140E-7 diesel meets Tier 4-F regulations with a diesel particulate filter and requires no diesel emissions fluid. It uses variable geometry turbochargers. An engine pre-lubrication system raises engine oil pressure before startup to ensure full lubrication of all engine components, the company says.
The operator’s station has no pillars, providing visibility to the job site, and the air suspension seat uses the company’s electronically controlled suspension system (ECSS) for operator comfort. Advanced joystick steering (AJSS) and electronic pilot control (EPC) provide precise response. Designed to boost productivity and reduce fatigue, the loader uses an automatic dig system and a semi-automatic approach and dump system. The loader has 45-degree stairways on the left and right, and walkways in front of the cab and on the rear counterweight.
Wheel loader technology
Variable traction control and modulation clutch system optimize tractive effort, and SmartLoader logic reduces fuel consumption. Closed center load-sensing hydraulics matches flow to demand, which saves fuel and reduced oil temperatures.
Technology enhancements include KomVision with radar obstacle detection. A six-camera system provides a view of the machine on a dedicated monitor, and an audible alert warns when an obstacle is detected. The machine-monitoring system displays onboard diagnostics on a monitor and requires no laptop for troubleshooting.